Each box contains 4 washable 6 1/2”x 2 1/2” organic cotton liners. A travel/wash pouch is included. They are perfect for light secretions or as a menstrual cup backup. A hook and loop closure to keeps them in place. The white is undyed and the black has been dyed using plant based dye. They are completely free of harmful chemicals and plastics. Just like the Smartliner period pads they are machine washable and dryer friendly.